Despite a growing push to reduce animal testing, USDA records show more than 37,000 dogs were used for research last year in the U. S. A CBS News investigation uncovered questions over the effectiveness of federal oversight on commercial breeding facilities that supply labs across the country.
Source: [CBS News](https://www.cbsnews.com/video/wisconsin-dog-breeder-faced-nearly-500-state-violations-but-didnt-see-federal-enforcement/)